Device and method for testing temperature and thermal stress distribution of reactor cabin

Abstract

The invention discloses a reactor cabin temperature and thermal stress distribution test device and a test method thereof. The device comprises a test cabin measuring point module, a heat source control module and a data acquisition module, the test chamber measuring point module comprises a reactor chamber test chamber, strain gauges and thermocouples, and the strain gauges and the thermocouples are distributed on the inner wall and the outer wall of the reactor chamber test chamber; the heat source control module comprises a heater, a temperature controller, a heating controller, a fan and a temperature sensor; the data acquisition module comprises a static strain gauge, a thermocouple signal acquisition card and an upper computer; the static strain gauge is used for acquiring temperature data of the strain gauge and transmitting the temperature data to the upper computer, and the thermocouple signal acquisition card is used for acquiring temperature data of the thermocouple and transmitting the temperature data to the upper computer. The device for testing the temperature and thermal stress distribution of the reactor cabin can detect the overall temperature and stress distribution of the reactor cabin, and provides a test platform for thermal load parameter design of a reactor cabin structure.

Description

Technical Field

[0001] The present invention relates to the technical field of bunker test, and in particular to a bunker temperature and thermal stress distribution test device and a test method thereof. Background Art

[0002] A large amount of heat is generated during the operation of the reactor core. Once a dangerous leakage accident occurs, the central heat source will cause the temperature in the cabin to rise rapidly, and the gas in the cabin will also begin to accelerate convection. Since the cabin structure is mainly composed of steel bulkheads with strong thermal conductivity and dense reinforcement, as the air temperature and wall temperature in the central area of ​​the cabin rise rapidly, a large amount of heat will diffuse to the external cabin through the cabin bulkhead, which is likely to pose a major threat to the hull structure and the lives of people on board. Ordinary ship design generally does not consider temperature stress, but for nuclear-powered ships and cabin structures, the consideration of temperature stress is extremely important.

[0003] In addition, the reactor will release a large amount of heat to the reactor compartment structure due to impact, collision or pipeline leakage, which puts it in a high temperature and high pressure environment. Since the reactor compartment is mainly made of steel, its material mechanical properties are severely reduced under high temperature and high pressure environment, and the yield strength and elastic modulus will be significantly reduced, so that the structure will quickly reach the limit load state and be damaged, resulting in a significant reduction in the structural bearing capacity. The temperature rise causes the thermal expansion of the material to produce a large additional stress, and the components will produce expansion and contraction deformation. The reactor compartment wall is thick and the structural gradient is obvious. Its expansion and contraction are limited, and high temperature stress is generated inside. In the reactor compartment containment compartment section, steel plates of different thicknesses divide the compartment into multiple closed chambers. The closed chambers in the compartment section are natural convection heat exchange. The structure around the reactor compartment containment is discontinuous, resulting in a larger temperature gradient and stress concentration. Therefore, in the design stage of the reactor compartment structure, it is necessary to analyze its temperature field and thermal stress distribution. In order to understand the characteristics of the thermal load parameters in the reactor compartment and ensure the effective operation of the equipment in the compartment, it is necessary to conduct experimental research on the thermal load parameters of the reactor compartment structure. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a test device and a test method for the temperature and thermal stress distribution of the stack compartment, which can detect the overall temperature and stress distribution of the stack compartment and provide a test platform for the design of thermal load parameters of the stack compartment structure.

[0005] To achieve the above-mentioned purpose, a test device for the temperature and thermal stress distribution of a reactor compartment is designed in the present invention, comprising a test compartment measuring point module, a heat source control module and a data acquisition module;

[0006] The test cabin measuring point module includes a stack test cabin, a strain gauge and a thermocouple, wherein the strain gauge and the thermocouple are distributed on the inner and outer walls of the stack test cabin, the strain gauge is used to monitor the strain data of the stack test cabin, and the thermocouple is used to monitor the temperature data of the stack test cabin;

[0007] The heat source control module includes a heater, a temperature controller, a heating controller, a fan and a temperature sensor; the heater is arranged in the inner cavity of the reactor test chamber for heating the heater; the temperature controller is used to set and control the central temperature of the heater; the heating controller is used to receive signals from the temperature controller to control the start and stop of the heater and the fan; the fan is used to blow air to the heater to form turbulence; the temperature sensor is used to monitor the central temperature data of the heater and transmit it to the heating controller;

[0008] The data acquisition module includes a static strain gauge, a thermocouple signal acquisition card and a host computer; the static strain gauge is used to collect temperature data of the strain gauge and transmit it to the host computer, and the thermocouple signal acquisition card is used to collect temperature data of the thermocouple and transmit it to the host computer.

[0009] Furthermore, the static strain gauge is connected to the strain gauge via a strain signal bundle.

[0010] Furthermore, the thermocouple signal acquisition card is connected to the thermocouple via a temperature signal bundle.

[0011] Furthermore, the temperature controller is connected to the heating controller via a double-core shielded wire and a power control wire.

[0012] Furthermore, the heating controller is connected to the fan by a shielded wire to control the start and stop of the fan.

[0013] Furthermore, the heating controller is connected to the heater by a cable to control the start and stop of the heater.

[0014] Furthermore, the heating controller is connected to a temperature sensor on the heater using an armored signal line to receive the center temperature of the heater.

[0015] Furthermore, the host computer is connected to the static strain gauge and the thermocouple signal acquisition card respectively through RS485 signal lines.

[0016] The present invention also provides a method for testing using the above-mentioned test device for cabin temperature and thermal stress distribution, comprising the following steps:

[0017] S1: Check the performance of each instrument and check whether the wire connection is normal;

[0018] S2: Seal the reactor test chamber with sealant, turn on the experimental instruments, and after confirming that everything is correct, prepare to energize the heater;

[0019] S3: Heat the heater and start recording various data;

[0020] S4: Make the heater reach the set temperature and keep it constant until the temperature of the bulkhead is stable and record the data;

[0021] S5: Observe experimental phenomena and record special situations that occur during the experiment;

[0022] S6: Stop heating and continue collecting data until the compartment of the reactor test chamber cools down;

[0023] S7: Save various data, preliminarily analyze experimental data, and analyze problems encountered in the experiment;

[0024] S8: Change the test conditions and repeat the next set of experiments starting from step S2;

[0025] S9: Complete all working conditions, finish the experiment, record data, and organize equipment.

[0026] 10. The method according to claim 9, characterized in that: in step S8, if the same test conditions are used, the experiment is repeated starting from step S2.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] Firstly, the test device for the temperature and thermal stress distribution of the reactor compartment of the present invention can simulate the heat accumulation and thermal stress distribution of the reactor compartment during the normal operation of nuclear power, and provide a test platform for the design of thermal load parameters of the reactor compartment structure by detecting the overall temperature and stress distribution of the reactor compartment.

[0029] Secondly, the test device for the temperature and thermal stress distribution of the stack compartment of the present invention adopts a fan, which can transform the natural convection of air into forced convection in the early stage of heating, thereby increasing the heating rate.

[0030] Thirdly, the test device for the temperature and thermal stress distribution of the reactor compartment of the present invention can realize the comprehensive planning of the temperature and stress measurement points inside and outside the reactor compartment, which can fully reflect the temperature and stress distribution characteristics and guide the thermal load and thermal stress structure design of the reactor compartment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a test device for compartment temperature and thermal stress distribution;

[0032] Figure 2 Figure a in the middle is the arrangement diagram of stress measuring points on the inner wall of the reactor compartment; Figure b is the arrangement diagram of stress measuring points on the inner wall of the reactor compartment from another angle;

[0033] Figure 3Figure a in the middle is the arrangement diagram of stress measuring points on the outer wall of the reactor compartment; Figure b is the arrangement diagram of stress measuring points on the outer wall of the reactor compartment from another angle;

[0034] Figure 4 Figure a in the middle is the arrangement diagram of stress measuring points on the reinforcement of the inner and outer walls of the reactor compartment; Figure b is the arrangement diagram of stress measuring points on the reinforcement of the inner and outer walls of the reactor compartment from another angle;

[0035] Figure 5 Figure a in the middle is the arrangement diagram of the temperature measuring points on the inner wall of the stack compartment; Figure b is the arrangement diagram of the temperature measuring points on the inner wall of the stack compartment from another angle;

[0036] Figure 6 Figure a is a left-view arrangement of the temperature measuring points on the outer wall of the stack compartment; Figure b is a rear-view arrangement of the temperature measuring points on the outer wall of the stack compartment; Figure c is a right-view arrangement of the temperature measuring points on the outer wall of the stack compartment; Figure d is a top-down arrangement of the temperature measuring points on the outer wall of the stack compartment; Figure e is a top-down arrangement of the temperature measuring points on the outer wall of the stack compartment;

[0037] Figure 7 Figure a is the left view layout of the temperature measuring points on the inner and outer wall reinforcements of the stack cabin; Figure b is the front view layout of the temperature measuring points on the inner and outer wall reinforcements of the stack cabin; Figure c is the right view layout of the temperature measuring points on the inner and outer wall reinforcements of the stack cabin; Figure d is the rear view layout of the temperature measuring points on the inner and outer wall reinforcements of the stack cabin; Figure e is the top view layout of the temperature measuring points on the inner and outer wall reinforcements of the stack cabin; Figure f is the top view layout of the temperature measuring points on the inner and outer wall reinforcements of the stack cabin;

[0038] Figure 8 The figure is a flow chart of the test method of the compartment temperature and thermal stress distribution;

[0039] In the figure: the stack test chamber 1, the strain gauge 2, the thermocouple 3, the heater 4, the temperature controller 5, the heating controller 6, the fan 7 and the temperature sensor 8, the static strain gauge 9, the thermocouple signal acquisition card 10, the host computer 11, the strain signal bundle 12, and the temperature signal bundle 13. DETAILED DESCRIPTION

[0040] The following is a detailed description of the implementation of the present invention in conjunction with the implementation cases, but they do not constitute a limitation of the present invention and are only given as examples. At the same time, the advantages of the present invention will become clearer and easier to understand through the description.

[0041] like Figure 1 As shown, a test device for the temperature and thermal stress distribution of a reactor compartment of the present invention comprises a test compartment measuring point module, a heat source control module and a data acquisition module; the test compartment measuring point module comprises a reactor compartment test compartment 1, a strain gauge 2 and a thermocouple 3, the strain gauge 2 and the thermocouple 3 are distributed on the inner and outer walls of the reactor compartment test compartment 1, the strain gauge 2 is used to monitor the strain data of the reactor compartment test compartment 1, the thermocouple 3 is used to monitor the temperature data of the reactor compartment test compartment 1, and the strain measuring points S1 to S25 of the strain gauge 2 are arranged as shown in FIG. Figure 2 to Figure 4 As shown, the temperature measuring points A1~A23, B1~B19, C1~C21, D1~D5, E1~E12, F1~F9 of thermocouple 3 are arranged as follows Figure 5 to Figure 7 shown.

[0042] The heat source control module includes a heater 4, a temperature controller 5, a heating controller 6, a fan 7 and a temperature sensor 8. Its main function is to simulate the heat source in the reactor compartment and heat the air to a specified temperature. The heater 4 is arranged in the inner cavity of the reactor compartment test chamber 1 for heating it; the temperature controller 5 is used to set and control the central temperature of the heater 4; the heating controller 6 is used to receive the signal of the temperature controller 5 to control the start and stop of the heater 4 and the fan 7; the fan 7 is used to blow air to the heater 4 to form turbulence; the temperature sensor 8 is used to monitor the central temperature data of the heater 4 and transmit it to the heating controller 6; the temperature controller 5 is connected to the heating controller 6 through a double-core shielded wire and a power control wire. The heating controller 6 is connected to the fan 7 with a shielded wire to control the start and stop of the fan. The heating controller 6 is connected to the heater 4 with a cable to control the start and stop of the heater. The heating controller 6 is connected to the temperature sensor 8 on the heater with an armored signal wire to receive the central temperature of the heater.

[0043] The data acquisition module includes a static strain gauge 9, a thermocouple signal acquisition card 10 and a host computer 11. The static strain gauge 9 is mainly used to collect strain data at various points in the cabin, and the thermocouple signal acquisition card 10 is mainly used to collect temperature data at various points in the cabin. The static strain gauge 9 is used to collect temperature data of the strain gauge 2 and transmit it to the host computer 11. The thermocouple signal acquisition card 10 is used to collect temperature data of the thermocouple 3 and transmit it to the host computer 11. The static strain gauge 9 is connected to the strain gauge 2 through the strain signal bundle 12. The thermocouple signal acquisition card 10 is connected to the thermocouple 3 through the temperature signal bundle 13. The host computer 11 is connected to the static strain gauge 9 and the thermocouple signal acquisition card 10 through the RS485 signal line.

[0044] like Figure 8 As shown, a method for testing using the above-mentioned test device for cabin temperature and thermal stress distribution in this embodiment is characterized by comprising the following steps:

[0045] S1: Check the performance of each instrument and check whether the wire connection is normal;

[0046] S2: Seal the reactor test chamber 1 with sealant, turn on the experimental instruments, and after confirming that everything is correct, prepare to energize the heater 4;

[0047] S3: heating the heater 4 and starting to record various data;

[0048] S4: Make the heater 4 reach the set temperature and keep it constant until the temperature of the bulkhead is stable and record the data;

[0049] S5: Observe experimental phenomena and record special situations that occur during the experiment;

[0050] S6: Stop heating and continue collecting data until the compartment of the reactor test chamber cools down;

[0051] S7: Save various data, preliminarily analyze experimental data, and analyze problems encountered in the experiment;

[0052] S8: Change the test conditions and repeat the next group of experiments starting from step S2; if the test conditions are the same, repeat the experiment starting from step S2;

[0053] S9: Complete all working conditions, finish the experiment, record data, and organize equipment.

[0054] The above are only specific embodiments of the present invention. It should be pointed out that any changes or substitutions that can be easily thought of by any technician familiar with the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. The rest not described in detail are prior arts.

Claims

1. A test device for compartment temperature and thermal stress distribution, characterized in that: It includes test chamber measuring point module, heat source control module and data acquisition module; The test cabin measuring point module comprises a cabin test cabin (1), a strain gauge (2) and a thermocouple (3), wherein the strain gauge (2) and the thermocouple (3) are distributed on the inner and outer walls of the cabin test cabin (1), the strain gauge (2) is used to monitor the strain data of the cabin test cabin (1), and the thermocouple (3) is used to monitor the temperature data of the cabin test cabin (1); The heat source control module comprises a heater (4), a temperature controller (5), a heating controller (6), a fan (7) and a temperature sensor (8); the heater (4) is arranged in the inner cavity of the reactor compartment test chamber (1) for heating the heater; the temperature controller (5) is used to set and control the central temperature of the heater (4); the heating controller (6) is used to receive signals from the temperature controller (5) to control the start and stop of the heater (4) and the fan (7); the fan (7) is used to blow air to the heater (4) to form turbulence; the temperature sensor (8) is used to monitor the central temperature data of the heater (4) and transmit it to the heating controller (6); The data acquisition module comprises a static strain gauge (9), a thermocouple signal acquisition card (10) and a host computer (11); the static strain gauge (9) is used to acquire temperature data of the strain gauge (2) and transmit the data to the host computer (11); the thermocouple signal acquisition card (10) is used to acquire temperature data of the thermocouple (3) and transmit the data to the host computer (11).

2. The test device for compartment temperature and thermal stress distribution according to claim 1, characterized in that: The static strain gauge (9) is connected to the strain gauge (2) via a strain signal bundle (12).

3. The test device for compartment temperature and thermal stress distribution according to claim 1, characterized in that: The thermocouple signal acquisition card (10) is connected to the thermocouple (3) via a temperature signal bundle (13).

4. The test device for compartment temperature and thermal stress distribution according to claim 1, 2 or 3, characterized in that: The temperature controller (5) is connected to the heating controller (6) via a double-core shielded wire and a power control wire.

5. The test device for compartment temperature and thermal stress distribution according to claim 4, characterized in that: The heating controller (6) is connected to the fan (7) by means of a shielded wire to control the start and stop of the fan.

6. The test device for compartment temperature and thermal stress distribution according to claim 5, characterized in that: The heating controller (6) is connected to the heater (4) via a cable and is used to control the start and stop of the heater.

7. The test device for compartment temperature and thermal stress distribution according to claim 6, characterized in that: The heating controller (6) is connected to a temperature sensor (8) on the heater using an armored signal line to receive the center temperature of the heater.

8. The test device for compartment temperature and thermal stress distribution according to claim 1, 2 or 3, characterized in that: The host computer (11) is respectively connected to the static strain gauge (9) and the thermocouple signal acquisition card (10) via RS485 signal lines.

9. A method for testing using the test device for compartment temperature and thermal stress distribution according to any one of claims 1 to 8, characterized in that: The steps include: S1: Check the performance of each instrument and check whether the wire connection is normal; S2: Seal the reactor test chamber (1) with sealant, turn on all experimental instruments, and after confirming that everything is correct, prepare to energize the heater (4); S3: heating the heater (4) and starting to record various data; S4: Make the heater (4) reach the set temperature and keep it constant until the temperature of the bulkhead is stable and record the data; S5: Observe experimental phenomena and record special situations that occur during the experiment; S6: Stop heating and continue collecting data until the compartment of the reactor test chamber cools down; S7: Save various data, preliminarily analyze experimental data, and analyze problems encountered in the experiment; S8: Change the test conditions and repeat the next set of experiments starting from step S2; S9: Complete all working conditions, finish the experiment, record data, and organize equipment.

10. The method according to claim 9, characterized in that: In step S8, if the test conditions are the same, the experiment is repeated starting from step S2.

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